You can check for that by looking down into the carb with a flashlight
and look for a small stream of gas to shoot every time you pull on the
throttle. If no squirt, your pump is shot. Usually the diaphragm.
That can also let gas dribble from the base of the carb in some
cases, "like mine" which will cause rough running and too rich.
I still think you need a new radiator if it actually turns out to be running
hotter than usual. Which I kinda suspect it is.. Most factory temp gauges
I see that get flaky show too cold, rather than too hot..
In fact, the one in my 68 is that way.. It barely moves off the bottom
peg when normal.. Only when overheating does it start to read "normal".
I don't worry about it, as I know it's normal resting point.
If it's obviously overheating with steam, gurgling, etc, I'd be almost sure your
radiator is shot. Like about
98.5% sure..
